What about materials with flame retardants like ABS?

Due to the fact flame retardants emit more gas than regular polymers, they require more frequent cleanings. A good way to provide for cleaning Porcerax II® is to have a blow back system in place in the mold, so that as the mold opens to eject the part, reverse the air flow and have a blast of air go through the Porcerax II® into the cavity. This accomplishes two things: First, it will help aid with the ejection of the part, and second, it will help purge any film that might build up on the Porcerax II® from the flame retardants.